Improvement in ink or writing-fluid



33mm tflliitet CHARLES HEBEL', OF LOUISVILLE, KENTUCKY.

Letters Patent No.'106,582, dated lugust 23, 1870.

LIMPRQVEMEN '1' IN INK OR WRITING-FLUID.

The Schedule referred to in these Letters Patent and making part of the same To all whom it may concerni Be it known that I, CHARLES HEBEL, of Louisville,

in the county of Jetferson and State of Kentucky,

have invented a new and useful Improvement in Indelible Writing-Fluid; and I do hereby declare that the following is 11. full, cleur, and exact description thereof, which will enable others skilled in the art to make zuid use the some. c

This inventionrelates to a new and useful improvement in. an indelible writing-fluid or ink, designed more, especially for use in banks and for filling up notes, checks, bonds, and similar obligations, but up plicnble to all kinds-oi writing, by means of which iisnuds may be prevented in the alteration-of such'pa pers; and

The invention consists in the composition'foriiied as hereinafter described;

In carryingout my invention and discovery I make of sulphate of iron dissolved in one'gallon' of hot water are then added to the first solution; then stir into the solution thus obtained ten ounces acetate of iron.

Dilute eight ounces indigo chemic in one-half gallon of water, and combine with the solution above described; t-hen dissolve one ounce aniline blue in onehulf gallon of water, and stir it into the solution.

The composition thus formed is well filtered when it is fit for use. 1 This fluid resists the ztc-tionvot' acids,rendering it impossible to frzuldulently alter signatures or filling out of checks, notes, bonds, 86G. For marking linen the fluid is all that could be 'desired. It Hours freelyon paper or ironed linen, is not liztblc to mold, and never tiules.

Having thus described my invention, Y I claim as new and desire to secure by Letters Pnt-eut-- The indelible fluid above described, substhntinlly as and for the purposes set forth.

* cuss. HEBEL.

Witnesses: V

JAoouKmEGuR, Sr., FRED. U. LEBER, M. D. 

